Hi Brian --
Just to get a response to you quickly -- I suspect that you're doing anything
inherently wrong or off-base, but are just nudging up against the limit to
which our current constructor and nesting features work well together. You may
have seen elsewhere that our constructor design and implementation are
currently in flux and on the way to a healthier implementation which should
hopefully fix up things like this.
The main part that surprised me looking at your code was the implication that
the compiler required you to add an 'outer' argument, which is something I
think of as being what it should be adding implicitly in the case of nested
stuff, when needed. The other thing I would experiment with, if I weren't
going to bed, is whether making the class and record non-generic simplifies
things at all.
The fact that de-nesting them makes things work is what makes me suspicious
that it's our problem rather than yours. But nested records and classes do
tend to throw me for a loop sometimes, especially this late in the evening...
-Brad
________________________________
From: Brian Guarraci [[email protected]]
Sent: Monday, May 04, 2015 9:17 PM
To: [email protected]
Subject: [Chapel-developers] nested classes
Hi,
I've run into a strange error while using I felt was a natural use of nested
records. Below is a snippet. It tries to use the parameterized types to
create an nested record which is then entries in a hash. There's a few errors
when I compile and eventually the only way to get it to work was to pull
ValueType and TableEntry up into the top-level of the module. Any ideas? I
didn't see much on this in the spec.
Thanks!
Brian
/*
test/nested_class.chpl:22: error: unresolved type specifier
'LockFreeHash(uint(32)).TableEntry'
test/nested_class.chpl:13: note: candidates are: TableEntry(_mt: _MT, outer)
*/
module LockFreeHash {
type KeyType = uint(32);
class LockFreeHash {
type ValueType = uint(32);
var hashSize: uint(32) = 1024*1024;
record TableEntry {
var key: atomic KeyType;
var value: atomic ValueType;
// test/nested_class.chpl:18: error: constructor for class 'TableEntry'
requires a generic argument called 'outer'
proc TableEntry(outer: LockFreeHash) {
key.write(0);
}
}
var array: [0..hashSize-1] TableEntry;
// removed methods
}
}
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